Pile fabric loom construction



Sept. 39, 1941. w D T 2,257,228

PILE FABRIC LOOM CONSTRUCTION Filed Oct. 5, 1939 4 Sheets-Sheet l INVENTOR. Mus/a HD/ETRlc-H ATTORNEYS Sept. 30, 1941,

w. H. DIETRICH FILE FABRIC LOOM CONSTRUCTION .Filed Oct. 5, 1939 4 Sheets-Sheet 2 Q E Q n INVENTOR. A/ALTER H. D/ETE/CH W2 A 'r'rnR Q Sept 30, 1941. w. H. DIETRICH 2,257,228

FILE FABRIC LOOM CONSTRUCTION Filed Oct. 5, 1939 4 Sheets-Sheet 5 as I J 5 INVENTOR. MLTER H. DIETRICH BY Mk4};

ATTORNEY 5 P 1941- w. H. DIETRICH 2,257,228

FILE FABRIC LOOM CONSTRUCTION Filed Oct. 5, 1939 4 Sheets-Sheet 4 Patented Sept. 30, 1941 PILE. FABRIC LOOM CONSTRUCTION Walter H. Dietrich, Hazleton, Pa., assignor to Duplan Silk Corporation, New York, N. Y., a

corporation of Delaware Application October 5, 1939, Serial No. 298,034

3 Claims. (Cl. 139336) The present invention relates to pile fabric looms and particularly relates to methods of operating pile fabric looms.

In the usual type of pile fabric looms, the loom is quite heavy and when the loom is operating with the lay moving backwardly and forwardly there is substantial inertia which makes it difiicult quickly to stop the loom and it is also quite diflicult for the weaver or loom operator to adjust the various parts of the looms to a desired position to enable ready repair or reattachment of either the warp or filling ends or replacement of the shuttles when exhausted.

It is, therefore, among the objects of the present invention to provide an improved loom mechanism or attachment which will permit more rapid stoppage of the loom and enable more ready adjustment or replacement of shuttles or repair of warp or filling ends with less damage to the goods.

Still further objects and advantages will appear from the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the invention.

According to the above objects, it has been found most satisfactory to provide an elevated readily accessible electromagnetic braking device immediately associated with and preferably on the same shaft as the motor for driving the loom.

In the preferred construction, in addition to the shipper lever utilized for latching the loom in operating position, a smaller jogging lever is utilized for moving the loom or the lay thereof into desired position or into the desired part of the cycle in which it should be to enable repair, replacement of shuttles or tying up of either warp or filler ends, as the case may be.

Referring to the drawings which illustrate several of the various possible embodiments of the present invention, but to which the present in vention is by no means restricted since the drawings are merely by way of illustration and not by way of limitation.

In the drawings:

Figure 1 is a diagrammatic side view of a pile fabric loom showing the electro-magnetic brake but only illustrating one warp, the wire connections of the electrically operated parts particularly in connection with two warps.

Figure 2 is a diagrammaticv plan view of one side of the loom structure of Figure 1 from above.

Figure 3 is a front elevational view of one side of the loom and shows the shipper handle in on position.

Figure 4 is a similar view to Figure 3 and shows the shipper handle in off position.

Figure 5 shows the electromagnetic brake upon an enlarged scale as compared to Figure 1.

Figures 6 and 7 are enlarged detailed elevational views of the drop contact elements associated with the warp ends, Figure 6 illustrating two of the elements in off or normal operating position and Figure 7 illustrating one of the elements in on machine stopping position.

Figures 8 and 9 illustrate an alternative brake construction, Figure 8 being a top plan view and Figure 9 being a side elevational View thereof, both of the views showing the side of the motor.

In the loom shown in Figures 1 to 3 only one warp is shown to enable a clearer showing, it being understood, however, that in a pile fabric loom there are a plurality of warps, for two ground fabrics and an intervening pile, which warps have separate carrying and guiding elements as will be more fully described in connection with Figure 10. I

The loom as shown in Figures 1 and 2 comprises a warp beam l0 carrying the warp II which passes over a whip roll l2 and. then goes through a Warp stop motion device contact assembly [3 which is automatically operated after the breakage of a Warp thread. The warp ll passes through harness frames l4, goes over a breast beam [5 (see Figure 2), and is wound in the usual way on a roll, not shown in the drawmgs.

The warp beam H] is carried by a separate support [6.

An electric motor I! is carried by the supports l8 and [9 (see Fig. 1). The electric motor I1 is a conventional split phase reversible motor manufactured by the General Electric Company, which motor is described on the name plate as Textile Mill Motor, model N0. 64A231, type KQ-3934-6-1-1200, 60 cycles, 2 phase, 220 volts, 1- H. P., 3.15 amps. #MJ-1246. The motor shaft 20 carries a pinion 2| (see Fig. 2) meshing with a toothed wheel 22 which is keyed to a crank shaft 23-. The rotation of the crankshaft 23 is transmitted through the crank 24 and the crank connector 25 to the lay sword 26 which carries the lay 21, and the shuttle 28, shown in Figure 2. The picker 29. is used for driving the shuttle 28 across the warp.

The crankshaft 23 also carries a pinion 33 which engages a toothed wheel 3| mounted on a shaft 32. (See also Figs. 3 and 4.)

The rotation of the wheel 3| is transmitted to other parts of the loom not shown in the drawings.

A weft feeler 35 is connected with a plate 33 carried by a support 34 and'is used to initiate the automatic stopping of the loom as soon as the filling of the shuttle has been exhausted.

A switch box 36 (see Figs. 1 to 4) comprises aswitch actuating element 31 which may be actuated to cut ofi the supply of the electrical current to the motor I1 and may be shifted to forward or backward. The 7 move the lay 21 switchiactuating element 31 may be operated by hand by swinging a shipper rod 38 or a jogging lever 39.

.The shipper rod 38 is moved automatically into an off position upon subsequent forward movement of the lay 21 after awarp thread breaks and the warp stopmotion device I3 is energized or after the shuttle 28 has run out of filling and the circuit is closed across the weft feeler 35.

A magnetic brake B, (see Figs. 1 and is situated at the side of the motor I1 and is provided with brake shoes 48 with friction linings M V which-surround a brake wheel 42 keyed. to the shaft 28. The brake shoes 48 are applied automatically to stop the rotationof the shaft 20 as soon as the current supply to the motor I1 is interrupted.

The electrical current for feeding the motor I1 is supplied by the main leads 43, 44 and 45.

' The leads 43 and 45 are connected with the motor I1 through the switch box 36, While the lead 44 is connected directly with the motor I1. The, secondary electrical circuit (see Fig. 1) which is used for the operating of the warp stop motion device I3 and the weft feeler 35 comprises two conducting wires 46 and 41 connected with a coil which forms a part of the windings of the motor I1 and is not shown in the drawings.

A shunt current in parallel with that flowing through the motor II will 'flow through the wlres46 and 41 at a low voltage of about or 12 volts.

The wire 41 is grounded to the machine at 48 while the'wire 46 passes through a fuse box 49a having a fuse 49 and is connected with the winding of a magnet 50. The wire 5I (see Fig. 1) leading out of the magnet 50 is connected with a wire 52 leading to the warp stop motion device I3 and is also connected with a conduit 54 leading to the weft feeler 35. Wires 53, one of which is shown in Figure 1, are connected with the opposite end of the device I3 and are grounded to the machine at 55 while a wire 56 connected with the other end ofthe weft feeler 35 is grounded at 51. r I

The magnet 58 is provided with a member 58 shown in Figures 3 and 4, which is attached to arod 59 operating a pawl 60 carried by the shipper rod 38. In the on position, in Figure 1, there is no current flowing through the magnet 50. As soon as a warp thread breaks and/or as soon as the shuttle runs, out of filling an electrical current will flow through the wires 46 and 5| and will energize the magnet 50. Then themagnet 50 will move the rod 59 upwardly so that the pawl 60 will also move upwardly into the position shown by broken lines in Figure 1.

The reciprocating lay 21 carries a dagger 6| which will strike the pawl 68 when the latter is in its upward position and this will release the shipper lever 38.

As shown in Figures 3 and 4, the lower part of the lever 38 is bent to form a resilient spring which is connected with a part of the frame and which has a tendency to move the lever 38 into the fofi position shown in Figure 4.

The lever 38'is held in its on position shown in Figure 3 by the walls of a recess formed in a slot 162 which is cut through the plate 33, as shown inFigure 2. I 'After the pawl 60 has been struck by the dagger 6I the shipper rod 38 will move to the right from the position shown in Figure 1 and move it out of the recess, so that the rod will swing withinthe slot 62 and will return to the oil? position shown in Figure 4.

f V 'A pin 63 carried by the shipper lever 38 slides in a slot 64 located in a connecting member 65 which is pivotally connected at 66 to the frame of the machine. The member 65 carries the jogging lever 39 as well as a rod 61 which is connected with the switch lever 31.

When the rod 38 moves into the off position shown'in Figure 4, the pin 63 will move to the right; shifting the rod 61 and the switch lever 31 upward and thus opening the switch,

However, the jogging lever 39 may be operated independently of the shipper lever 38 to move the lay 21 short distances forwardly and backwardly, since due to the provision of the slot 64 in the member 65 the lever 39 may be moved up and down by hand without changing the position of the rod 38. The jogging lever 39 is usually operated by the weaver in the moving of the lay either forwards or backwards for short distances while inserting new ends or for, other necessary repairs.

Referring to the jogging lever 39, when this lever is thrown in one direction, it will actuate the switch 36 through the elements 31 and 61 to turn the motor I1 to move the lay in one direction. When the jogging lever 39 is thrown in another direction, the motor I1 will be actuated in the opposite direction and a reverse movement of the lay will be obtained.

The warp stop motion device I3 is illustrated in detail in Figures 6 and 7. Each one of the warp threads II carries a separate thin drop blade element 68 made of copper or other conducting material and having a slot 69. A conducting electrode bar 18 projects through the slot 69 and carries one end of the wire 53, the other end of said wire being grounded to the machine at 55. The bar 10 is provided with an insulating portion H which surrounds a conductor 12 connected with one end of the Wire 52.

In the position shown in Figure 6 no current can flow between the wires 52 and 53 due to the provision of the insulator 1 I. It should be noted that the number of drop elements 68 and cooperating parts must correspondto the number of the warp threads since each thread carries a separate drop element 68. In Figures 6 and 7 each drop wire 68 is provided with separate connecting wires 52 and 53. These "wires may be interconnected to form a single lead shown diagrammatically in Figure 1.

As soon as a warp thread breaks, the corresponding drop element 68, which is guided by electrode bars 10, drops to a position shown in Figure 7. In this position the conductor 12 conneoted with the wire 52 comes in contact with the slanting wall 13 of the drop wire 68. A positive electrical connection will then be established between the wire 52, the conductor 12, the drop wire 68, the face. 1Ia of the electrode bar In and the wire 53.

Since the wire 53 is grounded to the machine while the wire 52 is connected with the magnet 58 which is supplied with electrical current from a coil of the motor H, the above-mentioned electrical connection will produce a current flowing through a circuit which comprises a coil of the motor I1, the electro-magnet 50 and the dropped element 68.

This current will'energize the magnet 5|] which will move the plunger 58 upward, thus placing the pawl 60 in a position in which it will be struck by the dagger 6| as soon as the oscillating lay sword 26 is brought again into its foremost position. The movement of the pawl 68 will free the shipper rod 38 which will swing into the off position and open the main electrical switch 31 thus interrupting the flow of the current to the motor IT.

The magnet brake B, with the shoes 48, which automatically stops the rotation of the motor shaft 28 as soon as the current supply to the motor I! is interrupted, is shown in detail in Figure 5.

The brake comprises a solenoid situated within a casing 88 and connected with the main wires 44 and 45 by means of conduits 8| and 82. The brake shoes 49 are carried by supports 83 and 84, which may move on pivots 85 and 86.

A spring 87 presses against the support 84 and against a plate 88 which is carried by a rod 89 movable with respect to the support 84 and connected with the support 83. A nut 98 screwed onto the rod 89 is used to hold the plate 88 in position and also to vary the force exerted by the spring 81.

A lever 9| is pivoted at 92 to the rod 89 and is firmly connected with a link 93 which is pivoted at 94 to an extension piece forming a part of the support 84.

An extension 95 is firmly connected with the lever 9| and may come into contact with a pin 96 carried by a link 91 which is connected with the plunger 98. The plunger 98 is moved by the solenoid situated within the solenoid casing 80.

In the position shown in Figure current is supplied to the motor I1, and, consequently, to the solenoid. The plunger 98 is situated in its lowest position and the arm 95 is in contact with the pin 99. The left end of the lever 9| is lower than its right end, so that the link 93 presses against the support 84 and moves it to the right against the action of the spring 81. Consequently the brake shoes 49 exert no pressure on the brake wheel 42.

As soon as the supply of electrical current to the motor I! and to the solenoid is interrupted, the solenoid becomes de-energized. Through the action of the spring 81, the lever 9|, with its arm 95, swings upward around the pivots 92 and 94, and the arm 95 comes in contact with the under-side of the pin 96, and raises the element 9'! into the position shown by broken lines in Figure 5.

The link 93 will swing together with the lever 9| and will move the support 84 to the left so that its brake shoe 49, will be pressed against the brake wheel 42.

At the same time, again the action of the spring 81 pressing against the plate 88, tends to move it to the right. Since the plate 88 is car ried by the rod 89, which is connected with the support 83, this pressure will be transmitted to said support 83, which will also press its brake shoe 4| against the brake wheel 42.

In the alternative construction of Figures 8 and 9, similarly functioning parts being indicated by the same numerals primed, the brake band 4| encircles the brake wheel 42', said brake band being intermediately provided with a carrier member I20 which is connected to the threaded rod |2| having the adjustment head I22. The threaded rod |2| extends through and is carried on the upright I89 which also is connected to the adjustable member I01, carrying one end of the coil spring 81'. a

The other end of the coil spring 81 is connected to the hook member or lever arm I08 which is pivotally mounted at I09 in the bracket or frame structure 9. The other arm N8 of the hook member I08 is pivotally connected with the link H0.

The lower end of said link is pivotally connected with one end of the said brake ban-d 4|. The upper end 8 of said link I I8 is pivotally connected by the pivot pin 5 to the eye I M of the main lever 9| The end of the lever 9| is connected to the reciprocatory armature member 98' which cooperates with the solenoid 88.

The upper end of the brake band 4| is connected to the supporting arm l which is connected to the bracket 9 at the pivot point 3 for the eye 2 of the lever arm 9|.

In operation, the armature 98' is shown in down position with current being on. When the current is cut oif, it will be moved into an elevated position by the spring 8'7 lifting the link 8 and closing the band 4| around the wheel 42.

This will immediately brake the machine in the same manner as the brake shoes 49 of Figure 5.

It is apparent the specific illustrations above shown have been given by way of illustration and not by way of limitation and that the structures above described are subject to wide variation and modification without departing from the scope or intent of the invention all of which variations and modifications are to be included Within the scope of the present invention.

What is claimed is:

1. In a pile fabric loom, a main motor for operating the lay, a main switch for controlling said motor, a shipper lever for controlling said main switch, a jogging lever for controlling said main switch, said jogging lever being connected to said shipper lever and being operable independently of said shipper lever to cause slight forward and backward movements of the lay when the shipper lever has been moved to inoperative position.

2. In a pile fabric loom, a main motor for operating the lay, a main switch for controlling said motor, a shipper lever for controlling said main switch, a jogging lever for controlling said main switch, and a connection between said jogging lever and said shipper lever consisting of a slotted link fixed to said jogging lever and having lost motion in respect to said shipper lever, said tances backwardly and forwardly when said shipper lever has been moved to disconnect said main switch and stop said motor.

3; In a pile fabric loom, in combination, means for inserting the weft threads, an electric motor for actuating said means, a brake for stopping said motor, electromagnetic means for releasing said brake, means for supplying an electrical current to said motor and said electro-magnetic releasing means, a switch connected with said ourrent-supplying means, a shipper rod, means connecting said shipper rod with said switch, and a jogging lever connected with the last mentioned connecting means, said jogging lever being capable of operating said switch independently of said shipper rod.

WALTER H. DIE'IRICH. 

